Terns

species: 
Sandwich Tern
scientific name: 
Thalasseus sandvicensis
notes: 

Yellow ring with a black 3 alpha-code (on left tarsus) and metal ring (on right tarsus).

note 1 : letter 'P' is on the lower position.

note 2 : 

email sighting submit: 
colour-ring type: 
Legring : one, coded.
colour-ring colour (of the c-ring): 
Yellow [Y]
colour-ring code (of the c-ring): 
Three alpha code (3 letters).
colour-ring position (of the c-ring): 
Tarsus left.
countries where ringed: 
Portugal.
First letter/number (of the c-ring): 
P